IMGURL is the URL of the image we want to download FILENAME is the new name of the file after it is downloaded The limitation of this method is that it must respect the same-origin. In the code below, make sure you swap in your own fileURL, Content-Type, and FileName. The function above is doing just the same, just that we create the anchor HTML Element on the fly, only for this download action and then we remove it. This technique produces a BLOB that can be streamed/saved directly from a web browser and works with both text and binary files. Howto download a file from SharePoint Library using REST. In order to get by this, I needed to fetch the file from the URL getting around any CORS policies to save a local Blob that would then be the source of the downloaded file. Downloading a file from SharePoint library using JavaScript and REST API. If you use this solution, do not initiate the file download unless a user clicks on a button to intentionally download. First, there’s a constructor, similar to Blob: new File( fileParts, fileName, options) fileParts is an array of Blob/BufferSource/String values. Generally, if a file is hosted at a URL that has a different domain that the site the user is currently on, immediate downloads are blocked by many browsers for user security reasons. A File object inherits from Blob and is extended with filesystem-related capabilities. FileSaver.js is the solution to saving files on the client-side, and is perfect for webapps. Attach this link to the document and simulate a click using the. FileSaver.js implements the saveAs FileSaver interface in browsers that do not natively support it. Set href as the URL created in the first step and download attribute as the downloaded file’s name. I wanted the user to be able to click a button and immediately initiate a download without popping open a new tab with a PDF preview. Thanks to FileSaver.js you will be able to save the data of a file in JavaScript as a download in your browser easily. I had a PDF file that was stored in S3 behind a Cloudfront URL. Fetch the file from the url, store it as a local Blob, inject a link element into the DOM, and click it to download the Blob
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